Sack.



A. A. DAUGHERTY- SACK.

APPLICATION FILED Nov. 30. 1914.

1 ,1 90,22 1 Patented July L, 1916.

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- "UNITED STATES PATENT ornron.

ALVIN A. D AUGHEB'IY, OF LOS ANGELES, CALIFORNIA.

. SACK.

I Specification of Letters I atent. I Patented J uly 4;, 1916,

Application filed November 30, 1914. Serial N 0. 874,921.

Be it known that I, ALVIN A. DAUGHERTY, a citizen'of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented a new and useful Sack, of which the following is a specification.

My invention relates to packages for containing finely comminuted materials, such as cements, plasters, or the like.

The principal. bject of the lnvention is to provide a package in which these finely di- .vided or powdered materials may be packed and which will be of such a structure that this material will not sift throu h the meshes of the package as it is handle This is ac- 'complishe'd by providing a composite package'composed of a metallic cloth, the interstices of the cloth being filled by packing strands of fabric. A large proportion of the cement, plaster, lime, and the like now used is putwup in cotton, ute, or similar sacks, these packages beinghandled many considerable proportioniof the contents is times before the contents thereof are finally used. In the handling of such packages a lost by sifting through the meshes thereof and.my package is especially designed to prevent this loss. Such packages are further subject to extremely rough usage and a further object of my invention is to provide 'apackage which will be much more durable and consequently longer lived.

In the practical use of jute, cotton, or'similar' sacks it is found that a large loss occurs,

due to the rotting of these sacks both during 7 their use and while they are in storage.

When these sacks have wholly or partially decayed they lose their tensile strength and are of nouse whatever. I

A further object of my invention is to provide a sack in which a metallic thread I or wire is used for the purpose of giving the necessary tensile strength, cotton, jute, or-

other fabric threads being, added to give greater flexibility, these fabric threads also, I

serving as soft. packing means-between the wire members to form an imperviouscloth.

A particular use for my 1mproved package is found in the cement industryjwhich'is of large proportions, the annual expendia. ture for sacks for use in this industry in the United States reaching the figure of $11,000,-

000. This is due to the rapid'deterioration of ordinary cotton or jute sacks both from rough handling and from v decay.

phere which carries considerable moisture therein. A considerable loss results in the industries using'these materials from the deterioration ofthe contents of the ordinary sacks due to the action of moisture-thereon.

A further object of,my invention is to produce apackage Whichw-ill be water proof.

My invention consists essentially of a package formed of a cloth containing both metallic and fabric threads. This cloth is so tightly woven that the fabric threads are compressed-between the metallic threads making an almost impervious package.

My invention further consists in coating this fabric on one or both sides with a water proof enamel or varnish, this enamel or varnish permeating and impregnating the fabric strands and producing a water proof and durable package.

Further objects and advantages will be evident to one skilled in the'art towhich the invention pertains especially after reading the annexed specification and claims and inspecting the drawing which forms a portion 1 thereof and which illustrates one embodiment only of the invention. ,The doctrine of0equivalents should therefore be broadly applied in construing the claims illustrated by'tllis drawing;

i In the drawing, Figure 1 is a perspective 'view of a filled and sealed package. Fig. 2

is a greatly enlarged View of the fabric from which the package is: formed without enamel. Fig. 3 is a section. on the plane m 'a2 of Fig. 2 with the enamel coatings'added.

' Thepackage may be of any desired shape,

anda closure 12. The cloth onsi'st-s of metallic "warp threads 13 .anidufa ric warp Fig.2.

It consists further of. metallicweft ranged alternately as shown lin' Fig. 2. It is obvious that the proportion of threads .does' not need to be absolutely that, shown, and

that shownin Fig. 1 being chosen for illusutra'tive purposes only. I r

This sack consists of a body portion 11 threads 14 arranged alternately as shown in threads 15 and fabric weft threads 16'ar- I that there may be two or more threads-of one kind to each thread of the other kind if desired. In weaving the fabric great care is exercised to force the metallic members 13 and 15 closely together, the fabric members 14 and 16 being compressed therebetween and forming packing means. It is further evident that even after these fabric members have become greatly weakened by decay that they will still serve as efficient packing means to prevent the filtration of material therethrough and that the metallic strands 13 and 15 will still furnish the necessary strength to the fabric. The 'nretallic strands are preferably of copper, or a copper alloy, but any material having the necessary characteristics may be used, galvanized iron, or a very pure iron may be used, or indeed any material which is flexible and durable. For the purpose of further improving the package outer and inner layers of varnish or enamel 17 and 18 are applied to the fabric. This varnish or enamel adheres readily to the metallic members and permeates and in'ipregnates the fabric members so that the water and dust proof qualities of the sack are greatly improved thereby. The sack is closed by any of the standard means,such as by sewing as shown at 19 in Fig. 1.

While the first cost of a package using copper threads will be large there will be a large salvage due to the scrap value of the copper and the total cost of using such packages will be small, due partlyto this 'salva e and partly to the great durability of such a package. Moreover such packages can be repaired with comparative ease by sewing 2. An imperfor'ate sack formed of fabric and copper wire members woven into a cloth.

3. An imperforatesack formed of fabric and metallic members Woven into a cloth, and having a coating of enamel or varnish applied thereto. l

4. An imperforate sack formed of fabric and copper wire members woven .into a cloth and having a coating of enamel or varnish applied thereto.

5. An imperforate sack formed of fabric and metallic .members woven into a cloth, and having aninternal and external coating of enamel applied thereto.

-6. Aii'imperforate sack formed of fabric and copper wire members woven into a cloth and having an internal and external coating of enamel applied thereto.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 21st day of November, 1914.

ALVIN A. DAUGHERTY.

In presence of FRED A. MANSFIELD,

FORD W. HARRIS. 

